Answer .
I have a '95 Contour but I'm sure it's the same for a '96. Firstly, there isn't a drain plug for the radiator. Sorry. But you can drain your radiator and coolant r…eservoir. When looking at your coolant reservoir or expansion tank, there will be two hoses that come out. One top and one bottom. Follow the bottom hose down to a conjunction of 3-4 hoses. There will be a hose that exits the bottom of the conjunction and runs under the car going towards the back of the car. It will be a fairly large hose with a hose crimp on it. undo the crimp and slide it back and CAREFULLY pull the hose off the tube. It will probably blast straight into the frame so be prepared. After letting all the fluids drain, You can reconnect the hose and run a radiator cleaner or a radiator flush through your radiator using your expansion tank. I would advise while you have everything drained, disconnect the two hoses from the reservoir and unbolt it from under the hood, and then clean it out. When I did it, it looked like a mix of mud and sludge coming out. \n.
\nSorry for the long answer, but hopefully it's thorough and helps someone out.

Answer .
\nYou do not mention the year but my 1999 Villager has 3 relays & 3 fuses and a heat sensor switch. If all that works check the fan motor. All I did to check the… motor was disconnect the power cable at the fan housing and and use an ohm meter to find the ground lead on Cable ( one lead to engine ground then other lead to each cable lead, the one that shows closest to zero will be the ground)then put 12 volts from corresponding lead on motor and to one of the other motor leads , one should be low speed the other high speed. There might be a different sensor I'm waiting for a manual to find out. Also check the connection terminal on temp switch mine was almost cut in two. Are you experiencing overheating problems?

you need to find out if its the fans are bad or is the coolant temp censor bad or thermostat or if there is air in system Answer one fan is intermittent and only comes on w…hen the engine reaches ideal temperature. the other only comes on when you turn on the AC. check fuses. Answer I had the same problem with my 1997 Mitsubishi ecplise. The shop tried to tell me that it is going to be alot of money to replace the temp sensor that is inside the head. We fixed it another way by wireing a switch to the sensor and we can turn the fans on when we need to, but it is just best to just keep them on when ever you turn your car on.

Answer Your problem could be a blown fuse.It could be a badsensor.It could be low on freon for the air cond.It could also be abad fan motor.All these are simple to check with …a good repairmanual,such as Haynes or Chiltons.Good Luck You may have accidentally unplugged/damaged the engine coolant tempsensor while changing the t-stat.

the system works like this. The eng has a thermo switch, which sences coolent temps around 185 to 195 fer. it produces a closed circut, which then applys voltage to the rad fa…n relay. which then handle lots more current, i.e amps..
could be a number of things, like thermostat,bad rad cap, thermo switch, fuse, relay,defective fan. or low on coolent..
VonJay F Leichtfuss

This happened to my gf's car... we had to install a new set of fans.. $700 at the shop $250 ourselves. Anyway... depending on the year there was a recall on the fan controller… module, if your fan motors are not burnt up already, you should take your vehicle to the nearest dealer to have that replaced or it could possibly burn out your fans, causing a bigger problem

Most often there is a temperature sensor that tells the fan to run or not: above 165F (in a lot of cases) the fan goes on, below that it is off to allow the engine to warm up …to running temperature. It varies from car to car and even day to day based on readings that the cars computer takes in running the engine.

It's most likely the module that is seated behind the left headlight. Sometimes they run all the time, and other times they won't run at all..
I replaced mine and it's fine n…ow (cost is about $75 at your Dodge dealer only).